DE102020107324A1 - Thermoforming film packaging - Google Patents

Abstract

It is a deep-drawn film packaging with a packaging body (1) consisting of a shell (2) and a cover film (3), the cover film (3) closing the shell (2) and the shell (2) being formed from a deep-drawing film. According to the invention, a printed material section (6) is arranged on the packaging body and is fastened to the packaging body (1) only in part of a circumferential edge with a fastening seam (7).

Description

The invention relates to a deep-drawn film packaging with a packaging body composed of a shell and a cover film, the cover film closing the shell and the shell being formed from a deep-drawn film.

Such deep-drawn film packaging are usually used for the packaging of foodstuffs, medical products or the like, the packaged products being protected by the shell formed from a deep-drawing film and being able to be presented to the user in an attractive manner. After opening the thermoformed film packaging, the products can be removed.

The tray and the cover film form a packaging body which is designed in such a way that a reliable closure is ensured and the end user can easily open the tear-open packaging. This is usually done by means of a correspondingly detachable closure seam which connects the shell and the cover film to one another and securely closes the packaging body. To open the deep-drawn film packaging, an unconnected section is then usually left at a corner of the cover film, which is arranged outside the sealing seam and which can be gripped by the end user and from which the cover film can be removed from the tray by loosening the sealing seam. Such detachable seams are also referred to as peelable seams. In contrast to this, non-peelable seams can no longer be opened, so that in the case of deep-drawn film packaging designed in this way, removal of the products packaged therein is only possible by destroying the cover film in particular.

In generic deep-drawn film packaging, the deep-drawn film is made significantly stiffer than the cover film, so that the shell gives the deep-drawn film package a certain degree of stability, the cover film lying flat or essentially flat on the shell and only having a two-dimensional structure. The material used for the cover film is usually a lamination composite with an inner film made of polyethylene (PE) and at least one outer film made of polyethylene terephthalate (PET), the inner film made of polyethylene having very good sealing properties, so that the cover film is heat-sealed over the inner film with the shell can be. In the case of heat sealing, a connection is made without an additional layer of adhesive, the material of both the shell and the cover film melting slightly and a material connection is established between the two layers.

In such a lamination composite, a printing layer can also be provided, which is preferably arranged between the inner film and the outer film, so that it is protected by the adjacent layers both inwards and outwards and thus a high-quality appearance is guaranteed over a long period of time. So that the printed layer remains visible from the outside, at least the outer film is transparent. The printing layer can be printed on both the inner and the outer film. If necessary, the film to be printed can be subjected to a corona treatment beforehand, as a result of which the adhesion for the printing layer is improved. In addition to the inner and outer film, further film layers can also be present.

Such deep-drawn film packaging is characterized by a particularly high-quality appearance and good functional properties, but plastic recycling is only possible to a very limited extent due to the various different materials, since a separation of the materials and thus a single-type recycling is hardly possible. Material recycling is understood to mean recycling within a main plastic class or preferably within a transparent polymer class. Against this background, known thermoformed packagings are usually as disposable items after their use no longer readily materially recyclable and are usually incinerated so that at least thermal recycling is still possible.

In the case of a single-type design, on the other hand, the plastic waste can be jointly recycled, but then the printing ink of the printing layer, which is often provided on the cover sheet, also impairs or even prevents joint recycling, since no transparent recyclate can be formed. For this reason, an effort is always made to provide a large part of the packaging with one type of material and, in particular, only to provide printing in a small area. At the same time, however, optically appealing packaging should be created for advertising purposes, so that printing cannot be entirely dispensed with. In particular, the end user must be provided with information about the packaged product as well as any ingredients and expiry dates.

Against this background, the present invention is based on the object of improving the possibilities for use and design of generic deep-drawn film packaging and, in particular, of improving the recyclability.

The object of the invention and the solution to the problem is therefore a thermoformed film packaging according to claim 1. Starting from a thermoformed film packaging of the type described at the outset, a printed section of material is therefore arranged on the packaging body and only attached to a part of a circumferential edge with a fastening seam on the packaging body. The term “fastening seam” does not refer to a specific design. Rather, every flat fastening, e.g. heat-sealed seams or adhesive seams, can be referred to as fastening seams.

The circumferential edge refers to a section of the printed material section. Since, accordingly, fastening only takes place on the circumferential edge, areas remain between the edge that lie unsecured on the packaging body. These unsecured sections lie flat on the packaging body and do not form any functional space, e.g. to accommodate any objects. Rather, the fastening seam should only extend over a small proportion of the area of the printed material section, so that the printed material section can be removed as completely and easily as possible.

The fastening seam preferably runs over a proportion of less than 20%, particularly preferably less than 15%, of the area of the unprinted material section. The invention thus differs from label solutions in which labels, for example made of a high-density polyethylene (HDPE), are attached to the packaging body via an adhesive surface arranged over the entire area on the back of the label.

Due to the printed material section, the printing can preferably be arranged completely on the additional material section, which then contains all essential information, e.g. about the packaging content, the ingredients of the packaged products, expiry dates, advertising information or the like. It is therefore not absolutely necessary for the packaging body to also have printing, so that the packaging body can be materially recycled in a simple manner and to a large extent.

A comparable solution is, for example, from the EP 3 594 144 A1 known, but in contrast to the above invention, an additional printed material section is provided on a film packaging which, compared to a deep-drawn film packaging, does not provide for any separation of the individual front walls from one another. The packaging body described there thus already forms a structural unit in which the material section is also preferably firmly or non-peelably connected to the front walls, so that perforation holes are provided for removing this material section. In contrast to this, in the case of deep-drawn film packaging, as already explained at the outset, a peelable connection is preferably provided between the cover film and the shell, so that the printed material section, when arranged on the cover film, is arranged on a component of the packaging body that is in any case in the course of opening the shell is removed. Accordingly, the invention deliberately accepts that if the individual fastening seams and sealing seams are not designed carefully, the deep-drawn film packaging can be inadvertently torn open in order, in return, to significantly simplify the recycling of the packaging.

Since the fastening seam does not run along the entire circumferential edge, the material section can also be grasped from behind in a simple manner, so that easy removal of the material section from the packaging body is possible. For this purpose, the fastening seam is preferably designed in such a way that it can be separated relatively easily. Such a peelable attachment can be set, for example, by precisely selected parameters, the material section on the one hand being so strongly attached to the packaging body that an unintentional separation is prevented as far as possible and on the other hand the material section can be separated without great effort by specifically reaching behind. This can be made possible, for example, by the type of fastening but also by the number of fastening points. Accordingly, it is provided that the fastening seam can be formed either continuously or discontinuously from several fastening points.

Alternatively, the material section can also be attached to the packaging body with a permanent or non-peelable fastening seam, in which case the printed material section preferably has a material weakening adjacent to the fastening seam, e.g. in the form of perforations, so that the material section can then also be removed to a large extent.

According to a preferred embodiment, the fastening seam extends over a proportion between 5 and 80%, preferably between 10 to 60%, particularly preferably between 15 and 50% of the circumferential edge. Correspondingly, the edge has an unconnected section between 20 and 95%, preferably between 40 and 90%, particularly preferably between 50 and 85%, wherein the printed material section can be reached behind and removed via the unconnected section of the peripheral edge.

A preferred embodiment of the invention provides that the printed material section is arranged on the cover film, the material section only covering the cover film to a proportion of between 30 and 80%, preferably between 40 and 70%. Of course, it is also within the scope of the invention that the printed material section rests on the shell or on the side walls of the shell, but an arrangement on the cover sheet enables a much more appealing appearance, since the material section then rests flat and the printed information is better are visible. In addition, deep-drawn film packs are usually stacked on top of one another on a shelf, with the cover film pointing upwards and thus the printed material section is directly visible from the outside and the information printed on it can be read. If the printed material section is nevertheless arranged on the deep-drawing film of the shell, the specified values relate to a projected area of the shell, which usually corresponds to the area of the cover film.

A configuration with a cover film or deep-drawing film that is not completely covered is particularly useful if, according to a further development, the cover film and / or the deep-drawing film are designed to be transparent. In this case, it is ensured that despite the use of an additional printed material section, it is possible to inspect the deep-drawn film packaging, so that, for example, the end user can immediately see what type of packaged product it is and does not have to rely solely on the information on the printed material section . Although, according to a preferred embodiment, both the shell and the cover film are transparent, it is basically sufficient if only the cover film or the deep-drawing film are transparent. Furthermore, the printed material section can also be transparent outside the printing.

According to an alternative embodiment, the printed material section is also arranged on the cover film and covers it over the entire surface, the printed material section having an imprint that covers the material section only to a proportion between 30 and 80%, preferably between 40 and 70%. Such a configuration is also particularly useful if at least the cover film and the printed material section are transparent, whereby this relates only to the non-printed sections with regard to the printed material section. Thus, even with a full-surface arrangement, it is still possible to see into the deep-drawn film packaging.

According to a preferred development of the invention, the deep-drawing film and / or the cover film are designed to be heat-sealable on the outside of the packaging, so that the fastening seam can be designed as a heat-sealed seam, preferably as a detachable heat-sealed seam. Preferably, however, the deep-drawing film and the cover film are designed to be heat-sealable on at least one inside of the packaging, the shell and the cover film then being able to be connected to one another via a sealing seam running along a circumferential side edge of the packaging body, the sealing seam also being designed as a heat-sealed seam.

In such a case, when the deep-drawn film packaging is closed, both the fastening seam and the sealing seam can be formed in just one sealing process, which in particular significantly reduces the process steps for producing the deep-drawn film packaging. It should be noted here, however, that in such a case the cover film, the deep-drawing film and also the printed material section are at least partially made of a sealable material or at least the film layers adjoining the heat-sealed seams are made of such a sealable material. In this context, polyolefins such as polyethylene (PE) or polypropylene (PP) are particularly suitable. However, such sealable materials generally only have poor printability, so that the printed surface of the material section either has to be formed from a different material or has to be subjected to a so-called corona treatment, which significantly increases the printability. However, such a corona treatment must then be omitted in the area of the heat-sealed seams, since although the printability is increased, the sealability is reduced at the same time.

According to an alternative embodiment, the fastening seam can also be designed as an adhesive seam, so that the printed material section is then fastened to the packaging body, in particular to the cover film, with the inclusion of an adhesive layer. This has the advantage that non-heat-sealable materials can also be attached to the packaging body. The packaging body itself is nevertheless, it is still preferably designed to be heat-sealable, so that the closure seam can be designed as a heat-sealed seam and the fastening can be designed as a glued seam.

With regard to the design of the closure seam, a detachable or peelable closure seam or heat-seal seam is particularly suitable, wherein, according to a particularly preferred embodiment, the closure seam has a securing section in which the closure seam is formed permanently and the closure seam is designed releasably outside the securing section. As a result, the detachable section allows the deep-drawn film packaging to be opened easily, while at the same time the securing section ensures that the cover film continues to adhere to the tray even in an open state. As a result, the entire packaging body can be jointly recycled, which is particularly useful in the case of a single-type design of the packaging body. Thus, according to an advantageous embodiment, the fastening seam is completely detachable and the closure seam is at least partially detachable.

The circumferential side edge preferably runs at least in sections along a circumferential side edge of the packaging body and the fastening seam is at least in sections congruent with the closure seam. As already explained above, this has the particular advantage that the closure seam and the fastening seam can be designed together as a heat-sealed seam. But even if the fastening seam is designed as an adhesive seam, this ensures that the fastening seam is provided at a point at which the deep-drawn film packaging is particularly stable.

According to a particularly preferred embodiment, the packaging body has a rectangular shape, the circumferential side edge being formed from two opposing first and two opposing second edge sections, the fastening seam being arranged only on the first edge sections.

The first edge sections can, for example, be long or short sides of the packaging body, the packaging body also being able to have a square shape so that all edge sections have the same length, the fastening seam always being formed from two opposing sections.

The present invention can be used particularly advantageously if the deep-drawing film and the cover film are of a single type. As mentioned above, one speaks of a single-type design if the deep-drawing film and the cover film are the same material or are materials which can be disposed of together. The material recyclability can be improved even further in that the packaging body is essentially unprinted. In the context of the invention, unprinted means that at least more than 90%, preferably more than 95%, particularly preferably more than 99% of the area of the packaging body has no printing.

Slight printing can be, for example, in the form of positioning marks for production, in batch numbers or, for example, also in expiry dates. Nevertheless, the printed surface sections are chosen to be so small that, despite the printing, joint material recycling is possible.

So that the packaging body can contain certain information even without printing, the shell can have an embossing, in particular an information embossing. Such information embossing can contain, for example, the brand name of the packaged product or else contain other information which should still be present even after the printed material section has been removed. The embossing can be formed, for example, by using stamping tools or also by a vacuum process in which the still molten or at least soft material of the deep-drawing film is formed in the course of the formation of the shell by introducing local vacuum zones with embossing.

According to a preferred embodiment of the invention, the printed material section preferably consists of a material selected from the group consisting of film, nonwoven, coated paper and multilayer laminate. Particularly preferred is an embodiment in which the material for the tray, the cover film and the unprinted material section are identical, and thus the entire film packaging is made of one type of material with regard to the material. Material recycling is then only impaired by the printing of the printed material section. Such a design has the advantage that the use of non-detachable fastening seams is also possible, with the area in the fastening seams then correspondingly being unprinted according to such an embodiment. In such a configuration, the material section can then be removed along the fastening seams, with material weaknesses, for example in the form of perforation lines, preferably directly adjoining the fastening seams for this purpose. Thus, sections of the unprinted material section remain on the packaging body, but because of the unprinted design, they can then be materially recycled together with this.

With regard to the use of the individual films, an embodiment has proven to be particularly advantageous in which the deep-drawing film has a thickness between 50 and 500 μm, in particular between 100 and 350 μm. The cover film and / or the printed material section preferably have a thickness between 20 and 150 μm, in particular between 60 and 100 μm, and can be identical in terms of thickness as well as in terms of the specific design, but also differently.

Preferably, the cover film and / or the printed material section and / or the deep-drawing film are multilayered and can have at least one, but preferably two, outer layers made of a polyolefin, in particular of polyethylene or polypropylene. These layers are particularly suitable for sealing, so that both the fastening seam and the sealing seam can be designed as a heat-sealed seam. The multilayer films are preferably designed as coextrusion films. Alternatively, however, the individual layers can also be welded, laminated or laminated to one another, in particular laminated with adhesive. In the case of adhesive lamination, a two-component adhesive based on polyurethane is used in particular.

In addition, the cover film and / or the printed material section and / or the deep-drawing film can have a barrier layer. This barrier layer is preferably arranged between an outer layer and an inner layer. The barrier layer can, for example, be provided directly as a coextrusion layer, e.g. made of ethylene-vinyl alcohol copolymer (EVOH), this then preferably having a thickness between 0.5 and 20 µm, preferably between 1 and 10 µm.

Alternatively, the barrier layer can also be applied as a coating to at least one of the outer layers. Suitable materials for this are silicon dioxide (SiOx) or aluminum dioxide (AlOx), the coating preferably having a thickness of less than 120 nm, preferably less than 100 nm, particularly preferably less than 80 nm. A coating of polyvinyl alcohol (PVOH), which is applied in a solvent-based manner to at least one of the outer layers, is also possible. The polyvinyl alcohol coating preferably has a basis weight of 0.2 to 2.8 g / m ² . The basis weight is particularly preferably less than 1.5 g / m ² , in particular less than 1 g / m ² . In addition, a metal layer can also be used as a barrier layer. In this case, at least one of the outer layers is metallized, the barrier layer preferably having a thickness of less than 220 nm, preferably less than 200 nm, preferably less than 180 nm. However, such a metal layer has the disadvantage that it can impair the visual appearance, since the barrier layer is preferably made transparent. However, this is not possible with a metallized barrier layer.

In principle, the barrier layers can thus be made very thin, so that they only make up a small proportion of contaminants in the corresponding film composite.

In particular in the case of a configuration with polypropylene in the outer layers, a barrier layer made of ethylene-vinyl alcohol copolymer with a proportion of ethylene of less than 35% by weight, preferably less than 30% by weight and particularly preferably less than 27% by weight is also used. % used. The proportion of polypropylene can be more than 90% by weight, preferably more than 95% by weight, based on the entire deep-drawn film packaging.

If the printed material section is attached to the packaging body via an adhesive seam, an adhesive layer is also provided between the cover film or the deep-drawing film and the printed material section, the adhesive layer preferably consisting of an adhesive based on polyurethane (PU), in particular a two-component polyurethane , consists.

• 1 eine erfindungsgemäße Tiefziehverpackung mit einem bedruckten Materialabschnitt in Streifenform
• 2 einen Querschnitt der Verpackung gemäß der 2
• 3 eine alternative Ausgestaltung der Tiefziehfolienverpackung mit vollflächig aufliegendem bedruckten Materialabschnitt
• 4 einen Querschnitt der Verpackung gemäß der 3
• 5 die Tiefziehfolienverpackung gemäß der 1 mit Blick auf die Unterseite
• 6 ein Verfahren zur Herstellung der Tiefziehfolienverpackung gemäß der 1
• 7 ein Verfahren zur Herstellung einer Tiefziehfolienverpackung gemäß der 3

The invention is explained in more detail below using an exemplary example. Show it:

• 1 a deep-drawn packaging according to the invention with a printed section of material in strip form
• 2 a cross section of the packaging according to FIG 2
• 3 an alternative embodiment of the deep-drawn film packaging with a printed material section overlying the entire surface
• 4th a cross section of the packaging according to FIG 3
• 5 the thermoformed film packaging according to 1 facing the bottom
• 6th a method for producing the deep-drawn film packaging according to FIG 1
• 7th a method for producing a deep-drawn film packaging according to FIG 3

the 1 shows a deep-drawn film packaging according to the invention with a packaging body 1 from a shell 2 and a cover sheet 3 who have favourited the shell 2 locks. The shell 2 has previously been brought into a three-dimensional structure from a deep-drawing film, through which a product can be received 4th is made possible.

The shell 2 and the cover sheet 3 are via a locking seam 5 connected to each other, the closure seam 5 is designed as a heat-sealed seam and a gas- and fluid-tight closure of the packaging body 1 guaranteed.

In the example shown, both the shell 2 as well as the cover sheet 3 and thus the entire packaging body 1 no printing whatsoever, although it is fundamentally within the scope of the invention that minor printing such as batch numbers, best-before dates or position marks on the packaging body 1 are printed. Basically, however, the entire information-relevant printing is on an additional printed material section 6th arranged, which is flat on the cover sheet 3 rests and with this via a fastening seam 7th connected is. This shows that the fastening seam is 7th only along part of the circumferential edge of the printed material section 6th extends and in two fastening seam sections 7a , 7b is divided, these fastening seam sections 7a , 7b in sections along a circumferential side edge of the packaging body 1 run and at least partially congruent with the sealing seam 5 are.

The packaging body 1 has a rectangular shape, the circumferential side edge being made up of two opposing first edge sections 8th and two opposite second edge portions 9 is formed. The fastening seam sections 7a , 7b are only at the first edge sections 8th arranged, the first edge portions 8th the short side and the second edge sections 9 the long side of the deep-drawn film packaging or the packaging body 1 form. Based on the length of the first edge sections 8th the fastening seam sections extend 7a , 7b each over 30 to 60%, so that a relatively large surface area of the cover film 3 not from the printed material section 6th is covered and is therefore visible from the outside. Such a configuration is particularly useful because the cover film 3 is transparent and thus the product 4th through the cover sheet 3 is visible. As a result, the end user can also without looking at the printing on the printed material section 6th recognize which product 4th it is about.

The exact structure of the thermoformed packaging can be determined by the 2 are removed, which the thermoformed packaging according to the 1 shows in a cross section. It can be seen here that the sealing seam 5 and the fastening seam 7th are congruent on top of each other and both are designed as heat-sealed seams. As a result, both the sealing seam 5 as well as the fastening seam 7th be formed, whereby the number of individual process steps is reduced.

The exact structure of the thermoformed packaging can be found in Table 1. Accordingly, there is both the printed material section 6th as well as the cover sheet 3 made of the same material, which consists of a layer made of a biaxially oriented polypropylene (BOPP) and a sealing layer, which are laminated to one another via a two-component polyurethane adhesive (2K-PUR). The sealing layer is a coextrusion layer (PP-EVOH), with a comparatively thin layer of ethylene-vinyl alcohol copolymer (EVOH) being arranged between two layers of polypropylene (PP). The layer made of ethylene-vinyl alcohol copolymer (EVOH) forms a gas barrier layer which at least makes it difficult for oxygen to penetrate, which means that, for example, the shelf life of food can be extended. To improve the adhesion, an adhesion promoter layer (HV) is arranged between the individual layers of the coextruded film.

The deep-drawing film of the shell 2 is designed as a coextrusion film (PP-EVOH), which was produced in particular by blown film extrusion. In a blown film extrusion, a tubular preform is formed, this preform being formed from a layer of ethylene-vinyl alcohol copolymer (EVOH) and two layers of polypropylene (PP), the layers of polypropylene including the layer of the ethylene-vinyl alcohol copolymer . The tubular preform is then laid flat, the layers of polypropylene lying on top of one another then blocking one another, so that the layer thickness is double and the barrier layer can be divided into two layers. This allows the thickness tolerances of the individual layers to be improved. Against this background, the layer structure of the deep-drawing film given in Table 1 relates to the preform. The specified thickness of the deep-drawing film, on the other hand, corresponds to the actual film thickness or the thickness of the preform laid flat with a doubled layer structure. Alternatively, the deep-drawing film can also be produced by cast film extrusion.

The fastening seam 6th is formed on a layer of biaxially oriented polypropylene (BOPP) and on a coextrusion layer (PP-EVOH). The closure seam 5 is accordingly formed from two layers of polypropylene (PP). The sealing layers can be composed in a known manner in such a way as to reduce the seal seam strength and to enable easy separation. Table 1 Material section 6 BOPP 20 µm 2K-PUR PP-EVOH 60 µm (PP / HV / EVOH / HV / PP) (25/4/2/4/25) Cover sheet 3 BOPP 20 µm 2K-PUR PP-EVOH 60 µm (PP / HV / EVOH / HV / PP) (25/4/2/4/25) Thermoforming film PP-EVOH 250 µm (PP / HV / EVOH / HV / PP) (45/5/5/5/65)

In a comparative view with the 5 shows that the shell 2 an information embossing on one underside 10 has, on the information without additional printing in the packaging body 1 can be introduced. This can be, for example, the brand name or a logo. Additionally or alternatively, the embossing can also be a symbol for the main plastic class of the material or materials used from which the deep-drawn film packaging was formed.

The show an alternative embodiment 3 and 4th , with the printed material section 6th now all over on the cover sheet 3 extends and along the first edge portions 8th via a fastening seam 7th on the cover sheet 3 is attached. In contrast to the 1 refer to the first edge sections 8th now on a long side of the packaging body 1 . In addition, the individual fastening seam sections 7A , 7B not designed as a heat-sealed seam but as an adhesive seam, so that an adhesive layer between the cover film 3 and the printed material section 6th is arranged. The material section 6th furthermore has printing which, however, does not cover the entire surface of the printed material section 6th extends, so that with a transparent design of the cover film 3 and the printed material section 6th still an insight into the packaging body 1 and thus on the packaged product 4th is possible.

The exact structure is based in particular on 4th and Table 2, whereby the structure is only reflected in the printed material section 6th of the design according to 2 differs. Since the material section 6th with the cover sheet 3 via a fastening seam designed as a glued seam 7th is connected, the material section 6th be formed exclusively from a biaxially oriented polypropylene film (BOPP) without an additional sealing layer. Table 2 Material section 6 BOPP 20 µm Cover sheet 3 BOPP 20 µm 2K-PUR PP-EVOH 60 µm (PP / HV / EVOH / HV / PP) (25/4/2/4/25) Thermoforming film PP-EVOH 250 µm (PP / HV / EVOH / HV / PP) (45/5/5/5/65)

The fastening seam extends independently of the specific configuration 7th only along a section of the circumferential edge of the printed material section 6th , the fastening seam 7th is designed so that the printed material section 6th can be removed relatively easily by reaching behind, so that it is independent of the packaging body 1 can be recycled. Accordingly, the fastening seams are 7th detachably formed. Alternatively, it is also possible to make this non-releasable, but then at least one perforation should be provided so that the printed material section 6th outside of the fastening seams 7th can be removed. In such a case, however, at least the areas of the printed material section should 6th , on which the fastening seam sections 7a , 7b run unprinted, so that this with a single-origin design with the shell 2 and the cover sheet 3 can be recycled together.

Also the closure seam 5 is designed to be detachable in the examples shown, with at least a portion of this sealing seam 5 is designed as a securing section and cannot be released in this area. This ensures that the cover sheet 3 even after opening the packaging body 1 on the shell 2 remains and can therefore be disposed of and recycled together.

the 6th FIG. 11 shows an exemplary method for producing a deep-drawn film packaging according to FIG 1 , with multiple packaging bodies 1 run in the machine direction MD, with only the shells in a first step 2 are fed from a deep-drawing film and in a second step with the cover film 3 and the printed material section 6th to be covered. Both the cover sheet 3 as well as the printed material section 6th are provided in the form of endless belts and each of rolls 11 taken.

In a sealing step, the sealing of both the cover film then takes place 3 with the shell 2 as well as the printed material section 6th with the cover sheet 3 in a sealing station 12th being both the closure seam 5 as well as the fastening seam 7th with the fastening seam sections 7a , 7b trains. The fastening seam sections run through the joint seal 7a , 7b congruent with the sealing seam 5 in the area of the first edge sections 8th which run in a transverse direction CD in such a method. The second edge sections run correspondingly 9 in the MD machine direction.

In a final step, the packaging body 1 by cutting through the cover sheet 3 and the printed material section 6th separated from one another, with the corners of the deep-drawn film packaging also being able to be trimmed at the same time. In such a trimming process, between 10 and 20 mm can be removed from the edge sections 8, 9 in order to avoid any incorrect positioning between the cover film 3 and shell 2 balance. In order to avoid too great a loss of material, trimming is preferably carried out only on the second edge sections 9 . In addition, the corners between the first and the second edge sections 8, 9 can also be stamped in a rounded manner.

the 7th FIG. 11 shows an alternative method for producing a deep-drawn film packaging according to FIG 3 . Here, too, are the shells 2 fed in a machine direction MD and then with a composite of a cover sheet 3 and the printed material section 6th covered. The cover sheet 3 was previously over a layer of adhesive 13th with the printed material section 6th connected so that the composite of the cover sheet 3 and the material section 6th in the form of a common endless belt from a roll 11 can be fed.

The adhesive layer 13th is only on the first edge sections 8th has been applied, the first edge portions 8th now extending in the form of two strips in the machine direction MD. and the The cover film is also dimensioned so that it is the cover film 3 completely covered. About the adhesive layer 13th then forms between the cover sheet 3 and the printed material section 6th a fastening seam 7th off, with the fastening seam sections 7a , 7b extend in the MD machine direction.

In a sealing station 12th becomes the cover sheet 3 then with the peel 2 sealed so that there is a sealing seam 5 forms along the circumferential side edge.

Last but not least, the individual thermoformed film packaging is separated and the circumferential side edges are trimmed.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 3594144 A1 [0013]

Claims (24)

Thermoforming film packaging with a packaging body (1) consisting of a tray (2) and a cover sheet (3), the cover sheet (3) closing the tray (2) and the tray (2) being formed from a thermoforming sheet, characterized in that a printed Material section (6) is arranged on the packaging body (1) and is only attached to a part of a circumferential edge with a fastening seam (7) on the packaging body (1). Thermoforming film packaging Claim 1 , characterized in that the fastening seam (7) extends over a proportion between 5 and 80%, preferably between 10 and 60%, of the circumferential edge. Thermoforming film packaging Claim 1 or 2 , characterized in that the printed material section (6) is arranged on the cover film (3), the material section (6) only covering between 30 and 80%, preferably between 40 and 70%, of the cover film (3). Thermoforming film packaging Claim 1 or 2 , characterized in that the printed material section (6) is arranged on the cover film (3) and covers the entire surface of the cover film (3), the printed material section (6) having a print that only covers the material section to a proportion between 30 and 80 %, preferably between 40 and 70% covered. Thermoforming film packaging according to one of the Claims 1 until 4th , characterized in that the cover film and / or the deep-drawing film are transparent. Thermoforming film packaging according to one of the Claims 1 until 5 , characterized in that the fastening seam (7) is designed as a heat-sealed seam. Thermoforming film packaging according to one of the Claims 1 until 6th , characterized in that the shell (2) and the cover film (3) are connected to one another via a sealing seam (5) running along a circumferential side edge of the packaging body (1), the sealing seam (5) being designed as a heat-sealed seam. Thermoforming film packaging according to one of the Claims 1 until 7th , characterized in that the fastening seam (7) is designed as an adhesive seam. Thermoforming film packaging according to one of the Claims 7 or 8th , characterized in that the fastening seam (7) is completely detachable and the closure seam (5) is at least partially detachable. Thermoforming film packaging according to one of the Claims 7 until 9 , characterized in that the closure seam (5) has a securing section on which the closure seam (5) is formed permanently and wherein the closure seam (5) is designed to be detachable outside the securing section. Thermoforming film packaging according to one of the Claims 7 until 10 , characterized in that the circumferential edge runs at least in sections along a circumferential side edge of the packaging body (1) and the fastening seam (7) is at least partially congruent with the closure seam (5). 12. Thermoforming foil packaging after Claim 11 , characterized in that the packaging body (1) has a rectangular shape and the circumferential edge is formed from two opposing first and two opposing second edge sections (8, 9), the fastening seam (7) only on the first edge sections (8) is arranged. Thermoforming film packaging according to one of the Claims 1 until 11 , characterized in that the deep-drawing film and the cover film (3) are made of one type. Thermoforming film packaging according to one of the Claims 1 until 12th , characterized in that the packaging body (1) is essentially unprinted. Thermoforming film packaging according to one of the Claims 1 until 13th , characterized in that the shell (2) has an embossing, in particular an information embossing (10). Thermoforming film packaging according to one of the Claims 1 until 14th , characterized in that the printed material section (6), the deep-drawing film and the cover film (3) are designed to be sorted, the printed material section (6) being unprinted at least in the area of the fastening seam (7). Thermoforming film packaging according to one of the Claims 1 until 15th , characterized in that the deep-drawing film has a thickness between 50 and 500 µm, in particular between 100 and 350 µm. Thermoforming film packaging according to one of the Claims 1 until 16 , characterized in that the cover film (3) and / or the printed material section (6) has a thickness between 20 and 150 µm, in particular between 60 and 100 µm. Thermoforming film packaging according to one of the Claims 1 until 17th , characterized in that the printed material section (6) comprises a material selected from the group consisting of film, nonwoven and coated paper. Thermoforming film packaging according to one of the Claims 1 until 18th , characterized in that the cover film (3) and / or the printed material section (6) and / or the deep-drawing film are multilayered. Thermoforming film packaging Claim 19 , characterized in that the cover film (3) and / or the printed material section (6) and / or the deep-drawing film have at least one outer layer made of polyolefin, in particular made of polyethylene or polypropylene. Thermoforming film packaging Claim 19 or 20th , characterized in that the cover film (3) and / or the printed material section (6) and / or the deep-drawing film have at least one barrier layer. Process for the production of a deep-drawn film packaging according to one of the Claims 1 until 21 - wherein shells (2) are supplied from a deep-drawing film, - wherein the shells (2) are covered with a cover film (3) and a printed material section (6), - both the cover film (3) and the shell in one sealing step (2) via a sealing seam (5) and the printed material section (6) are heat-sealed to the cover film (3) via a fastening seam (7), - the cover film (3) and the printed material section (6) between two successive ones Shells are severed in the transverse direction (CD). Process for the production of a deep-drawn film packaging according to one of the Claims 1 until 21 - wherein shells (2) are fed from a deep-drawing film, - wherein a composite of a cover film (3) and a printed material section (6) attached to the cover film (3) via a fastening seam (7) is fed, - the shells (2) are covered with the composite, - the composite with the shell (2) being heat-sealed via a sealing seam (5) in a sealing step, - the cover film (3) and the printed material section (6) between two successive shells in Cross direction (CD) are severed. Procedure according to Claim 23 , wherein the fastening seam (7) is formed via an adhesive layer (13).

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